Prepare the tuna. If using raw tuna, ensure that it is sushi-grade and cut it into bite-sized cubes. If using cooked tuna, simply flake it into pieces.
Cook the quinoa. Prepare the quinoa according to the package instructions, or use a pre-cooked version for quicker preparation.
Make the dressing. In a small bowl, mix together the low-sodium soy sauce (or tamari), sesame oil, and rice vinegar.
Assemble the bowl. Start with the base of quinoa or rice in a serving bowl. Arrange the tuna, edamame, and any additional toppings like avocado or cucumber on top.
Drizzle and enjoy! Pour the prepared dressing over the bowl, sprinkle with sesame seeds if desired, and dig in.
Notes
Nutrition will vary based on optional toppings included.